<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<style type="text/css">
			.menu{
				margin: 50px auto;
				
			}
			*{padding: 0;margin: 0;list-style: none;}
			.menu li{
				line-height: 25px;
				width:250px;
				background: linear-gradient(90deg,cornflowerblue 25%, cadetblue);
				transition: all 1s; 
				
			} 
			.menu li a{
				display: block;
				height: 25px;
				line-height: 25px;
				width:250px;
				border: 1px solid white;
				border-radius: 5px;
				background: linear-gradient( 90deg,cornflowerblue 25%, cadetblue);
			}
			.menu li .cont{
				height: 0px;
				transition: all 1s; 
			}
			.menu li:hover .cont{
				height: 300px;
				width:250px;
				background: greenyellow;
				
			}
			
		</style>
	</head>
	<body>
		<div class="menu">
			<ul>
				<li>
					<a>今日说法</a>
					<div class="cont">
						
					</div>
				</li>
				<li>
					<a>今日说法</a>
					<div class="cont">
						
					</div>
				</li>
				<li>
					<a>今日说法</a>
					<div class="cont">
						
					</div>
				</li>
				<li>
					<a>今日说法</a>
					<div class="cont">
						
					</div>
				</li>
				<li>
					<a>今日说法</a>
					<div class="cont">
						
					</div>
				</li>
				<li>
					<a>今日说法</a>
					<div class="cont">
						
					</div>
				</li>
			</ul>
		</div>
	</body>
</html>
